Drought And Soil Microflora In Different Apple Growing Technologies
Keywords:
drought, soil microorganisms, apple, technologiesAbstract
The investigation was carried out during 2007 at the Institute of Agriculture – Kyustendil, Bulgaria with apple cultivar Florina grafted on clonal rootstock MM 106 and planted at 4,5x2,5 m in 1996. The experiment included following growing thechnologies: Standard (conventional), Integrated, Resource-economical and Biological.
The amount of bacteria using mineral and organic nitrogen, actinomycetes, microscopic fungi and aerobic cellulose degrading microorganisms in two depth – 0 - 20 cm and 20-40 cm (in spring, summer and autumn) was established.
In drought year the amount of soil microorganisms in biological technology was above the standard – 133% and includes two soil layers: 147% - in depth 0 - 20 cm and 116% - in depth 20 - 40 cm, respectively.
The lowest amount of soil microorganisms was in the standard thechnology. Porosity of soil was low and indicate lower biological activity.
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